Karyotype and leaf epidermis histology traits of Digitaria abyssinica (Hochst. Ex A. Rich.) (Poaceae)

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorChaves, Ana Luisa Arantes-
Autor(es): dc.creatorChiavegatto, Raquel Bezerra-
Autor(es): dc.creatorFerreira, Marco Tulio Mendes-
Autor(es): dc.creatorRocha, Laiane Corsini-
Autor(es): dc.creatorAzevedo, Ana Luisa Sousa-
Autor(es): dc.creatorBenites, Flávio Rodrigo Gandolfi-
Autor(es): dc.creatorTechio, Vânia Helena-
Data de aceite: dc.date.accessioned2026-02-09T12:50:03Z-
Data de disponibilização: dc.date.available2026-02-09T12:50:03Z-
Data de envio: dc.date.issued2021-05-31-
Data de envio: dc.date.issued2021-05-31-
Data de envio: dc.date.issued2020-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/46432-
Fonte completa do material: dc.identifierhttps://doi.org/10.2478/s11756-020-00630-8-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1169162-
Descrição: dc.descriptionDigitaria abyssinica (African couchgrass) has economic potential as forage. This species is taxonomically complex, with a high number of synonyms, basic chromosome number x = 9, and diploid and tetraploid cytotypes. Anatomical, histological, and cytotaxonomic studies may contribute to the taxonomic description of this species and reveal its polyploidization and hybridization events. To this end, this study aimed to characterize the karyotype and leaf epidermis histology of two D. abyssinica genotypes. Chromosome characterization was performed based on chromosome banding using chromomycin A (CMA) and 4,6-diamidino-2-phenylindole (DAPI) and identification of 35S and 5S rDNA sites by fluorescent in situ hybridization. Nuclear DNA quantification was performed by flow cytometry. Paradermal sections were obtained for the leaf epidermis study by light and electron microscopy. The results confirmed that both genotypes are tetraploid (2n = 36). The number and distribution of 35S and 5S rDNA sites suggest the occurrence of postpolyploidization structural chromosomal changes or hybridization processes. Despite intraspecific variation in the number of 5S rDNA sites and CMA+/DAPI+ bands, no changes were identified in karyotypical symmetry or genome size. Leaf epidermis histology traits and cytogenetic data can support breeding programs and germplasm banks in identifying species or cultivars.-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceBiologia-
Palavras-chave: dc.subjectDigitaria abyssinica-
Palavras-chave: dc.subjectAfrican couchgrass-
Palavras-chave: dc.subjectCytotaxonomy-
Palavras-chave: dc.subjectChromosomal polymorphism-
Palavras-chave: dc.subjectHeterochromatin-
Palavras-chave: dc.subjectPolyploidy-
Palavras-chave: dc.subjectCitotaxonomia-
Palavras-chave: dc.subjectPolimorfismo cromossômico-
Palavras-chave: dc.subjectHeterocromatina-
Palavras-chave: dc.subjectPoliploidia-
Título: dc.titleKaryotype and leaf epidermis histology traits of Digitaria abyssinica (Hochst. Ex A. Rich.) (Poaceae)-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

Não existem arquivos associados a este item.